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path: root/drivers/input/serio/serport.c
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Diffstat (limited to 'drivers/input/serio/serport.c')
-rw-r--r--drivers/input/serio/serport.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c
index 8755f5f..f369896 100644
--- a/drivers/input/serio/serport.c
+++ b/drivers/input/serio/serport.c
@@ -120,17 +120,21 @@ static void serport_ldisc_close(struct tty_struct *tty)
* 'interrupt' routine.
*/
-static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *cp, char *fp, int count)
+static unsigned int serport_ldisc_receive(struct tty_struct *tty,
+ const unsigned char *cp, char *fp, int count)
{
struct serport *serport = (struct serport*) tty->disc_data;
unsigned long flags;
unsigned int ch_flags;
+ int ret = 0;
int i;
spin_lock_irqsave(&serport->lock, flags);
- if (!test_bit(SERPORT_ACTIVE, &serport->flags))
+ if (!test_bit(SERPORT_ACTIVE, &serport->flags)) {
+ ret = -EINVAL;
goto out;
+ }
for (i = 0; i < count; i++) {
switch (fp[i]) {
@@ -152,6 +156,8 @@ static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *c
out:
spin_unlock_irqrestore(&serport->lock, flags);
+
+ return ret == 0 ? count : ret;
}
/*
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